So with Variant Pokemon finally being a thing thanks to "Alolan Forms" how would you feel about the concept or introduction of "living" fossil pokemon?

Say lets say thanks to either ISOLATION or FERAL populations: fossil Pokemon have been thriving in certain locations and have either been RETURNING to their original or true-to-wild forms that no longer have rock as their secondary typing.

With that in mind:

-What secondary typing or singular typing would you give to the new "natural/wild" fossil pokemon?

-+Bonus+ How else do you think you could change them? Visually, move-wise or stat distribution, etc.